The Calathea needs humidity.
- Place under its pot a saucer filled with clay marbles, which need to stay constantly humid.
- Do not hesitate to spray water on its foliage if the air becomes dry.
- Ideally, place it in a darker room and avoid placing it in direct sunrays.
- Water with moderation, and let the soil getting dry between watering.
- In the spring and the summer, every fortnight, give it a liquid fertilizer especially suited to green plants.
- Expect and foresee an annual repoting, to be done in the spring into a slightly bigger pot.
- After a few years, a surfacing should replace one every other repoting.